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Vulnerability details: VCID-p6jp-2k11-5kg4
Vulnerability ID VCID-p6jp-2k11-5kg4
Aliases CVE-2024-21908
GHSA-5h9g-x5rv-25wg
GMS-2021-132
GMS-2021-163
GMS-2021-189
Summary TinyMCE versions before 5.9.0 are affected by a stored cross-site scripting vulnerability. An unauthenticated and remote attacker could insert crafted HTML into the editor resulting in arbitrary JavaScript execution in another user's browser.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00517 https://api.first.org/data/v1/epss?cve=CVE-2024-21908
epss 0.00517 https://api.first.org/data/v1/epss?cve=CVE-2024-21908
epss 0.00517 https://api.first.org/data/v1/epss?cve=CVE-2024-21908
cvssv3.1 6.1 https://github.com/advisories/GHSA-5h9g-x5rv-25wg
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-5h9g-x5rv-25wg
ssvc Track https://github.com/advisories/GHSA-5h9g-x5rv-25wg
cvssv3.1 6.1 https://github.com/tinymce/tinymce
generic_textual MODERATE https://github.com/tinymce/tinymce
cvssv3.1 6.1 https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wg
cvssv3.1_qr MODERATE https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wg
generic_textual MODERATE https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wg
ssvc Track https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wg
cvssv3.1 6.1 https://vulncheck.com/advisories/vc-advisory-GHSA-5h9g-x5rv-25wg
ssvc Track https://vulncheck.com/advisories/vc-advisory-GHSA-5h9g-x5rv-25wg
cvssv3.1 6.1 https://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes
generic_textual MODERATE https://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes
ssvc Track https://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2024-21908
https://github.com/tinymce/tinymce
GHSA-5h9g-x5rv-25wg https://github.com/advisories/GHSA-5h9g-x5rv-25wg
GHSA-5h9g-x5rv-25wg https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wg
#securityfixes https://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes
vc-advisory-GHSA-5h9g-x5rv-25wg https://vulncheck.com/advisories/vc-advisory-GHSA-5h9g-x5rv-25wg
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/advisories/GHSA-5h9g-x5rv-25wg
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-01-08T17:08:03Z/ Found at https://github.com/advisories/GHSA-5h9g-x5rv-25wg
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/tinymce/tinymce
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wg
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-01-08T17:08:03Z/ Found at https://github.com/tinymce/tinymce/security/advisories/GHSA-5h9g-x5rv-25wg
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://vulncheck.com/advisories/vc-advisory-GHSA-5h9g-x5rv-25wg
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-01-08T17:08:03Z/ Found at https://vulncheck.com/advisories/vc-advisory-GHSA-5h9g-x5rv-25wg
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-01-08T17:08:03Z/ Found at https://www.tiny.cloud/docs/release-notes/release-notes59/#securityfixes
Exploit Prediction Scoring System (EPSS)
Percentile 0.67135
EPSS Score 0.00517
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-10T18:38:49.987800+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2024/21xxx/CVE-2024-21908.json 38.6.0